Isaac Childres, the designer of super-mega-hit-best-board-game-of-all-time Gloomhaven, announced in this year's SHUX that a new game in the Gloomhaven line (untitled so far) will hit the stores in mid 2020.
This is going to be a more casual version of Gloomhaven with four new characters and a 24-scenario campaign, mostly meant to ease new gamers into the system. The price will be around 40-50 dollars.
The new characters will be: Valrath Redguard, Inox Hatchet, Human Necromancer, and Quatryl Demolitionist (you can look at the pictures on this thread).
Update November 16: The game will be called Gloomhaven: Jaws of the Lion.